Abstract: An air suspension system for a load bearing vehicle which includes a pair of air springs fluidly connected to a pair of auxiliary air reservoirs and to a main air reservoir. The system includes control valves which permit the air in the air springs to be exhausted therefrom to lower the vehicle frame without exhausting the air from the auxiliary air reservoirs.

Abstract: A flipper door assembly for use on a cabinet or the like. A generally rectangular door sized to cover the desired cabinet opening is suspended by a rack and pinion suspension mechanism. The rack and pinion suspension mechanism includes a pair of gear racks mounted in the cabinet opening and a corresponding pair of pinion gears located above the gear racks and engageable therewith. The pinion gears are connected to each other by an axle shaft. Hinges are mounted to the upper inside surface of the door with the hinge pivots parallel to the top of the door. The ends of the hinges mounted to the door are flat and the other ends are L-shaped with the outermost end of each hinge being rotatably mounted on the axle shaft.